Release study and inhibitory activity of thyme essential oil-loaded chitosan nanoparticles and nanocapsules against foodborne bacteria

Sotelo-Boyás, María Elena; Correa‐Pacheco, Zormy Nacary; Bautista‐Baños, Silvia; Gómez, Yolanda Gómez y

doi:10.1016/j.ijbiomac.2017.05.063

Cited by 118 publications

(73 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results show that the non-encapsulated EOs are more effective or exhibit the same antimicrobial activity as encapsulated EOs. In our study, these findings have been expected and are consistent with other studies [32][33][34]. On the other hand, it must be mentioned that some researchers have achieved the opposite results [35].…”

Section: Discussionsupporting

confidence: 93%

Development of pH-Responsive Biopolymeric Nanocapsule for Antibacterial Essential Oils

Skaličková

Aulichova

Venusová

et al. 2020

IJMS

View full text Add to dashboard Cite

It is generally believed that antibacterial essential oils have the potential to become one of the alternatives in preventing diarrheal diseases of monogastric animals. The disadvantage is their low efficiency per oral due to easy degradation during digestion in the stomach. This study compares the efficacy of chitosan, alginate-chitosan, guar gum-chitosan, xanthan gum-chitosan and pectin-chitosan nanocapsules to the synthesis of pH-responsive biopolymeric nanocapsule for Thymus vulgaris, Rosmarinus officinalis and Syzygium aromaticum essential oils. Using spectrophotometric approach and gas chromatography, release kinetics were determined in pH 3, 5.6 and 7.4. The growth rates of S. aureus and E. coli, as well as minimal inhibition concentration of essential oils were studied. The average encapsulation efficiency was 60%, and the loading efficiency was 70%. The size of the nanocapsules ranged from 100 nm to 500 nm. Results showed that chitosan-guar gum and chitosan-pectin nanocapsules released 30% of essential oils (EOs) at pH 3 and 80% at pH 7.4 during 3 h. Similar release kinetics were confirmed for thymol, eugenol and α-pinene. Minimal inhibition concentrations of Thymus vulgaris and Syzygium aromaticum essential oils ranged from 0.025 to 0.5%. Findings of this study suggest that the suitable pH-responsive nanocapsule for release, low toxicity and antibacterial activity is based on chitosan-guar gum structure.

show abstract

Section: Discussionsupporting

confidence: 93%

Development of pH-Responsive Biopolymeric Nanocapsule for Antibacterial Essential Oils

Skaličková

Aulichova

Venusová

et al. 2020

IJMS

View full text Add to dashboard Cite

show abstract

“…[35] Various essential oils have been successfully encapsulated using chitosan. [39][40][41][42][43][44][45] The concentration of chitosan significantly affects encapsulation efficiency of citronella oil, that is, increasing chitosan concentration decreases the efficiency of encapsulation. [39] The size of the capsules is affected by mechanical forces, such as stirring or homogenization speed [39] or homogenization pressure [46] , that is, within the nanometre to micrometre scale.…”

Section: Introductionmentioning

confidence: 99%

Emulsion stability of clove oil in chitosan and sodium alginate matrix

Purwanti

Zehn

Pusfitasari

et al. 2018

International Journal of Food Properties

View full text Add to dashboard Cite

Clove oil was emulsified in 1% w/w chitosan (CC emulsions) and 2.5% w/w sodium alginate matrix (CA emulsions) containing Tween 80 as the surfactant. Different homogenization speeds (5,000, 10,000, 15,000 and 20,000 rpm) were used to produce the emulsions, and the stability of the emulsions during storage (29 days) was determined. The stability of the emulsions containing clove oil prior to the solidification process was assessed when chitosan and sodium alginate were used as encapsulating materials. Different homogenization speeds resulted in polydisperse emulsions with a size of 2-3 μm and 90% of stability after 29 days of storage. Different homogenization speeds did not significantly affect the concentrations of the active compounds contained in the emulsions. However, these concentrations changed significantly after 29 days of storage when sodium alginate was used to make the emulsions and the homogenization speeds were ≥ 10,000 rpm. High temperature caused by the high viscosity of the solution and high energy dissipation during homogenization suggested that the emulsions composed of sodium alginate were unstable. Chitosan enabled a longer processing time during the clove oil encapsulation process compared to sodium alginate, when emulsification by homogenization was used. The stability of the emulsion of the clove oil-inchitosan matrix prior to the solidification step was superior. ARTICLE HISTORY

show abstract

“…The release profile of the sponge-like and finger-like side of the membranes was analysed by detecting the water-soluble components of TTO (terpinen-4-ol, α-terpineol, and 1,8-cineole) 62 released in a water bath UV-visible spectroscopy ( Figure S1). 58,63 The sponge-like side exhibited a faster release (72 and 81% after 1 and 2 hours, respectively) than the finger-like side (54 and 70% after 1 and 2 hours, respectively). For antibacterial tests, all membranes were loaded with the essential oil from the side with open porosity (sponge-like morphology), as schematised in Fig.…”

Section: Resultsmentioning

confidence: 99%

Bioinspired Poly(vinylidene fluoride) Membranes with Directional Release of Therapeutic Essential Oils

et al. 2018

View full text Add to dashboard Cite

Here, the morphology of polypore fungi has inspired the fabrication of poly(vinylidene fluoride) (PVDF) membranes with dual porosity by nonsolvent-induced phase separation (NIPS). The fruiting body of such microorganisms is constituted of two distinct regions, finger- and sponge-like structures, which have been successfully mimicked by controlling the coagulation bath temperature during the NIPS process. The use of water at 10 °C as coagulant resulted in membranes with the highest finger-like/sponge-like ratio (53% of the total membrane thickness), while water at 90 °C allowed the formation of macrovoid-free membranes. The microchannels and the asymmetric porosity were used to enhance the oil sorption capacity of the PVDF membranes and to achieve directional release of therapeutic essential oils. These PVDF membranes with easily tuned asymmetric channel-like porosity and controlled pore size are ideal candidates for drug delivery applications.

show abstract

Release study and inhibitory activity of thyme essential oil-loaded chitosan nanoparticles and nanocapsules against foodborne bacteria

Cited by 118 publications

References 20 publications

Development of pH-Responsive Biopolymeric Nanocapsule for Antibacterial Essential Oils

Development of pH-Responsive Biopolymeric Nanocapsule for Antibacterial Essential Oils

Emulsion stability of clove oil in chitosan and sodium alginate matrix

Bioinspired Poly(vinylidene fluoride) Membranes with Directional Release of Therapeutic Essential Oils

Contact Info

Product

Resources

About